240212505 has 16 divisors (see below), whose sum is σ = 413904960. Its totient is φ = 118258368.

The previous prime is 240212501. The next prime is 240212509. The reversal of 240212505 is 505212042.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (240212501) and next prime (240212509).

It is not a de Polignac number, because 240212505 - 2² = 240212501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (240212501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 615735 + ... + 616124.

It is an arithmetic number, because the mean of its divisors is an integer number (25869060).

Almost surely, 2^240212505 is an apocalyptic number.

It is an amenable number.

240212505 is a deficient number, since it is larger than the sum of its proper divisors (173692455).

240212505 is a wasteful number, since it uses less digits than its factorization.

240212505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231880.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 240212505 is about 15498.7904366760. The cubic root of 240212505 is about 621.6298644280.

Adding to 240212505 its reverse (505212042), we get a palindrome (745424547).

The spelling of 240212505 in words is "two hundred forty million, two hundred twelve thousand, five hundred five".